@article{RM_1967_22_1_a9,
     author = {Yu. V. Egorov and V. A. Kondrat'ev},
     title = {Existence of a~solution to a~problem with oblique derivative},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1967_22_1_a9/}
}